Malicious PDF — malware analysis report

Static analysis result for SHA-256 f90302cfc2b21e38…

MALICIOUS

PDF

74.2 KB Created: 2021-03-11 03:04:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 3e713526064d80d89f15cc2184e6ddfb SHA-1: 556f9ebeeaecae7bf2ecb5d21f9d0aae1a2259ec SHA-256: f90302cfc2b21e388e48daa227f0919c10ee50b50b1996d08201d74d814fc516
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution campaign. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically highlights the use of link farms on disposable hosting, reinforcing the malicious nature of the sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/wix?keyword=can+am+spyder+manual PDF link annotation
    • http://m-ryanaf.site/70204980177hhrro.pdfIn PDF document text
    • http://kaboliwup.mypressonline.com/jaragubanafemorofitale.pdfIn PDF document text
    • http://freud.icu/halo_trial_descargarh6ptf.pdfIn PDF document text
    • https://fifofisepag.weebly.com/uploads/1/3/5/9/135985139/tawuki.pdfIn PDF document text
    • https://cdn.sqhk.co/kubasovusi/ia3hjDN/chocolate_ice_cream_recipe_pampered_chef.pdfIn PDF document text
    • https://rugilebeme.weebly.com/uploads/1/3/1/3/131380811/f8009ddd1.pdfIn PDF document text
    • http://monongzhlh.space/21_day_fix_vegetarian_food_listkrfk6.pdfIn PDF document text
    • http://mattelipsticks.site/mad_world_piano_sheet_music_freeki3dr.pdfIn PDF document text
    • https://rafutukeri.weebly.com/uploads/1/3/1/4/131453201/nezofaridusijep.pdfIn PDF document text
    • https://tutuludoj.weebly.com/uploads/1/3/0/8/130874598/6f39282bed3.pdfIn PDF document text
    • https://cdn.sqhk.co/tudenireso/dJ3ihgi/instagram_apple_watch_5.pdfIn PDF document text
    • https://gexuguxibam.weebly.com/uploads/1/3/2/6/132696321/a14ded3504ea4a6.pdfIn PDF document text
    • http://nomevufaneboja.mypressonline.com/job_interview_questions_and_answers_for_fresh_graduates_call_center.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/Kih5ihQ/potivuvixom.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/27772172506.pdfIn PDF document text
    • http://instas.site/56450862647fwyns.pdfIn PDF document text
    • http://tixesikixux.mygamesonline.org/drawing_flowers_book.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/31f8c923-b230-4b6e-a6a0-77fadfd0e5a8/lotus_car_logo_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5ec10f5-29ef-42b9-bd07-47d39a5ac3d6/23715687005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0464195e-9544-4b61-8a07-4981c54c11f7/nerujukedara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90ff6b82-d74f-4f0f-83bb-1e0969086194/amigurumi_tutorial_left_handed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad946369-be9a-49be-88ee-132ea63dd7a8/how_to_replace_a_belt_on_a_dirt_devil_vacuum_cleaner.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE718 5112 bytes
SHA-256: 0efa2ad76d9bb2d0228f83b8391f393405a5c535bf98b43d3e5bd8d745b72f9a
font_01_sfnt_off0000f867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF867 10296 bytes
SHA-256: 12e19e556d14c42e20a9d8d8f9c71a6723e791dee91a52da45664b3fb676e298

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